7989943 has 4 divisors (see below), whose sum is σ = 8604568. Its totient is φ = 7375320.

The previous prime is 7989929. The next prime is 7989973. The reversal of 7989943 is 3499897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7989943 - 2⁹ = 7989431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7989973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307293 + ... + 307318.

It is an arithmetic number, because the mean of its divisors is an integer number (2151142).

Almost surely, 2^7989943 is an apocalyptic number.

7989943 is a deficient number, since it is larger than the sum of its proper divisors (614625).

7989943 is a wasteful number, since it uses less digits than its factorization.

7989943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614624.

The product of its digits is 489888, while the sum is 49.

The square root of 7989943 is about 2826.6487224273. The cubic root of 7989943 is about 199.9161565229.

The spelling of 7989943 in words is "seven million, nine hundred eighty-nine thousand, nine hundred forty-three".